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Preparation method of superfine modified ground limestone

A technology for the preparation of heavy calcium carbonate, applied in dyeing physical treatment, dyeing low-molecular organic compound treatment, fibrous fillers, etc. low level problem

Active Publication Date: 2014-06-25
潍坊双冠新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the modifying agent will decompose and deteriorate when it acts at 140°C, and the finished product of heavy calcium carbonate obtained by this method is yellow in color and has a very low whiteness; meanwhile, the heavy calcium carbonate is modified in a liquid state, The waste of modifier is very large

Method used

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  • Preparation method of superfine modified ground limestone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation process for superfine modified ground calcium carbonate, comprising the steps of:

[0028] (1) bubble paste

[0029] Fully mix stone powder, water, and sodium polyacrylate, including 69kg of stone powder, 26kg of water, 7kg of dispersant, and 30 minutes of soaking time;

[0030] (2) grinding

[0031] A four-stage wet grinding method is adopted. In the first-stage grinding, the flow rate of the slurry is 6t / h, and 0.4kg of sodium polyacrylate is added during the grinding process. The grinding temperature is 20°C and the grinding time is 60min; the second-level grinding In the process, the flow rate of the slurry is 6t / h, and 0.4kg of sodium polyacrylate is added during the grinding process, the grinding temperature is 30°C, and the grinding time is 60min; in the third-stage grinding, the flow rate of the slurry is 6t / h, and Add 0.4kg of sodium polyacrylate during the grinding process, the grinding temperature is 30°C, and the grinding time is 60min; in th...

Embodiment 2

[0038] A preparation process for superfine modified ground calcium carbonate, comprising the steps of:

[0039] (1) bubble paste

[0040] Fully mix stone powder, water, and sodium polyacrylate, including 74kg of stone powder, 31kg of water, 13kg of dispersant, and 30 minutes of soaking time;

[0041] (2) Grinding

[0042] A four-stage wet grinding method is adopted. In the first-stage grinding, the flow rate of the slurry is 6t / h, and 0.4kg of sodium polyacrylate is added during the grinding process. The grinding temperature is 20°C and the grinding time is 60min; the second-level grinding In the process, the flow rate of the slurry is 6t / h, and 0.4kg of sodium polyacrylate is added during the grinding process, the grinding temperature is 30°C, and the grinding time is 60min; in the third-stage grinding, the flow rate of the slurry is 6t / h, and Add 0.4kg of sodium polyacrylate during the grinding process, the grinding temperature is 30°C, and the grinding time is 60min; in t...

Embodiment 3

[0049] A preparation process for superfine modified ground calcium carbonate, comprising the steps of:

[0050] (1) bubble paste

[0051] Fully mix stone powder, water, and sodium polyacrylate, including 72kg of stone powder, 29kg of water, 10kg of dispersant, and 30 minutes of soaking time;

[0052] (2) grinding

[0053] A four-stage wet grinding method is adopted. In the first-stage grinding, the flow rate of the slurry is 6t / h, and 0.4kg of sodium polyacrylate is added during the grinding process. The grinding temperature is 20°C and the grinding time is 60min; the second-level grinding In the process, the flow rate of the slurry is 6t / h, and 0.4kg of sodium polyacrylate is added during the grinding process, the grinding temperature is 30°C, and the grinding time is 60min; in the third-stage grinding, the flow rate of the slurry is 6t / h, and Add 0.4kg of sodium polyacrylate during the grinding process, the grinding temperature is 30°C, and the grinding time is 60min; in t...

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Abstract

The invention relates to a preparation method of superfine modified ground limestone. The preparation method of the superfine modified ground limestone comprises the following steps of: (1) steeping slurry; (2) grinding in a four-level wet-method grinding manner; (3) drying: carrying out spray drying on the slurry by using a spray drying device; and (4) modifying: grinding and dispersing the collected ground limestone powder by a dry method at the grinding rate of 1460r / min, and adding modifiers in the grinding process so as to obtain the superfine modified ground limestone. By using the four-level wet-method grinding manner and a method of modifying subjected to drying, the problem of waste of modifiers during liquid modification is solved, and the activating rate and whiteness of the product are improved.

Description

technical field [0001] The invention relates to a preparation process of heavy calcium carbonate, in particular to a preparation process of ultrafine modified heavy calcium carbonate. Background technique [0002] Heavy calcium carbonate is a calcium carbonate product obtained by physical methods. Generally, high-purity limestone (such as calcite, chalk, etc.) is used for grinding. The density of heavy calcium carbonate is heavier than that of light calcium carbonate, and the sedimentation volume is larger. Low. At present, calcium carbonate has been widely used in papermaking, plastics, plastic films, chemical fibers, rubber, adhesives, sealants, daily chemicals, cosmetics, building materials, coatings, paints, inks, putty, sealing wax, putty, felt packaging, medicine , food (such as chewing gum, chocolate), and feed, its functions include: increasing product volume, reducing cost, improving processing performance (such as adjusting viscosity, rheological properties, vulca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/02C09C3/08C09C3/04C09C3/10
Inventor 李冠周胡振一
Owner 潍坊双冠新材料有限公司
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